1. Product Name:Newton Cradle
2. Material: plastic + metal ball
3. Size: Large 18*17.5*14.5 Medium 14*13.5*11.5 Small 9.2*9*7.5
4. Weight: Large 400 g Medium 200 g Small 100 g
5. Product features: strong and durable, not easy to rust, touch and move,decompression, decoration, beautiful and practical